JP4737590B2 - Optical connection adjusting device and adjusting method, and optical wiring manufacturing method - Google Patents

Description

  The present invention relates to an optical connection adjusting device and adjusting method, and an optical wiring manufacturing method. In particular, the present invention relates to an optical connection adjusting device and adjusting method in optical communication, and an optical wiring manufacturing method.

  In recent years, optical communication capable of high-speed transmission and free from problems of interference and noise has attracted attention as a means of communication not only for long-distance use but also between boards or chips in a server due to demand for large-capacity communication. At present, optical communication wavelengths of 1.55 microns, 1.3 microns, or 0.85 microns, which are near infrared regions, are used based on the loss of materials and the wavelength of the light source, and 1.55 and 1.3 microns are long. Distance communication, 0.85 micron, is used properly depending on short-distance communication and distance. Both wavelengths deviate from the human visible region, and the material itself is very small in absorption, so that the state of light propagation cannot be observed from the outside.

  In communication between boards and chips, in order to directly connect photodiodes and laser diodes, optical waveguides in which a core and a clad are laminated on an electric substrate are considered, parts other than waveguides that change the direction of light, Components such as condenser lenses are used in combination with optical waveguides. Therefore, the problem is the alignment of the optical axes between the components. Optical fibers and optical waveguides that propagate light using total reflection at the interface between the core and the clad with different refractive indexes are very small, 50 microns in multimode and 8-10 microns in single mode. Even a gap will result in a large loss. For this reason, it is very important to adjust the core position (optical axis) between optical devices.

  In an optical waveguide, since the difference in refractive index between the core and the cladding is as small as several percent or less, it is difficult to see the core position directly with the naked eye. For this reason, conventionally, a method of confirming the position of the core of the optical waveguide with reflected light or a microscope and marking the core at the position is used. In addition, a technique has been proposed in which a core is visualized by mixing a dye having a visible color or generating fluorescence by irradiation with ultraviolet rays into a core material of an optical waveguide (see Patent Document 1).

  If the position of the core is known by these methods, the optical device that enters the light into the optical waveguide is abutted against the core, the light is incident, and the intensity of the light emitted from the optical waveguide is measured. The position of the device that maximizes the light intensity can be obtained (see, for example, Patent Document 3). According to this method, there is no problem when an optical device is connected to only one end face of the optical waveguide, but there is a problem when an optical device is connected to each end face of the optical waveguide.

  As an example of the adjustment method in this case, the incident and outgoing light monitoring optical fibers are abutted against the respective end faces of the core, light is incident, the intensity on the outgoing side is measured, and the intensity is maximized. It is conceivable to simultaneously adjust the positions of the incident side fiber, the outgoing side fiber, and the optical waveguide. However, since the incident side and the emission side are adjusted at the same time, there is a risk of adjusting to the local optimum position.

  On the other hand, conventionally, a technique has been proposed in which a substance that generates fluorescence is mixed with a core material of an optical waveguide, and fluorescence is generated by irradiating ultraviolet rays from the side surface of the optical waveguide (see Patent Document 2). . According to this technology, the generated fluorescence propagates in the optical waveguide, and the intensity of the fluorescence emitted from the optical fiber connected to both end faces of the optical waveguide is monitored to independently adjust the incident side and outgoing side fibers. be able to. For this reason, compared with the technique which adjusts the position of the entrance side and the exit side at the same time, the risk of adjusting to the local optimum position is low.

JP-A-8-075938 JP-A-8-043689 JP 2004-219786 A

  However, according to Patent Document 2, in order to irradiate light that excites fluorescence from the side surface of the optical waveguide, it is necessary to provide a special fluorescent device that is unnecessary during normal communication. In addition, since the light incident method and propagation direction are significantly different from those during normal communication, the accuracy of optical axis adjustment may not be good. Furthermore, if a pigment or a fluorescent substance is mixed in the waveguide material, there is a risk of increasing the propagation loss of light that is actually propagated in optical communication.

  As described above, the technique disclosed in Patent Document 1 is intended to visualize the core and is not a technique for adjusting the optical axis. In addition, as described above, the technique of Patent Document 3 may cause a problem when the optical axes on both the incident side and the emission side are adjusted. Furthermore, since the technique of Patent Document 3 is a technique for adjusting the positional relationship between the light emitting element and the optical waveguide, it is difficult to apply to the optical axis adjustment between the optical waveguide and the optical waveguide.

  Accordingly, an object of the present invention is to provide an optical connection adjusting device and adjusting method and an optical wiring manufacturing method capable of solving the above-described problems. This object is achieved by a combination of features described in the independent claims. The dependent claims define further advantageous specific examples of the present invention.

  In order to solve the above problems, in the first embodiment of the present invention, an optical connection between an optical waveguide and an optical wiring component that receives light incident on or emitted from the optical waveguide. And an excitation light incident part for making light that fluoresces the optical waveguide enter the optical waveguide from an optical wiring component, and light propagating through the optical waveguide is incident or emitted. The light observation unit that receives the fluorescence emitted from the optical waveguide and that receives the fluorescence emitted from the optical waveguide, and the light of the optical wiring component and the optical waveguide based on the intensity of the fluorescence received by the light observation unit. An adjustment device including a connection adjustment unit for adjusting connection, an adjustment method using the adjustment device, and an optical wiring manufacturing method using the adjustment device are provided.

  According to a second aspect of the present invention, there is provided an adjusting device for adjusting an optical connection between an optical waveguide and an optical wiring component that receives light incident on the optical waveguide or receives light emitted from the optical waveguide. In addition, an excitation light incident part that makes light that causes fluorescence in the optical waveguide incident on the optical waveguide by the optical wiring component, and fluorescence in the optical waveguide that is emitted from the optical waveguide to the optical wiring component are received. An adjustment device comprising: a light observation unit; and a connection adjustment unit that adjusts the optical connection between the optical wiring component and the optical waveguide based on the intensity of fluorescence received by the light observation unit, and an adjustment method using the adjustment device And a method of manufacturing an optical wiring using the adjusting device.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  According to the present invention, it is possible to appropriately adjust the optical axis of the optical waveguide.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the scope of claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.

  FIG. 1 shows the configuration of the adjusting device 10. The adjustment apparatus 10 includes an excitation light incident unit 100, a normal light incident unit 110, a light observation unit 120, an optical wiring component position and orientation control unit 130, a straightness determination unit 140, and a connection adjustment unit 150. . The adjustment device 10 makes optical connection between the optical waveguide in the optical waveguide substrate 30-1 and the optical fiber 20-1 that is an optical wiring component that makes light incident on the optical waveguide with higher accuracy than ever. The purpose is to adjust.

  The excitation light incident unit 100 causes excitation light that fluoresces the optical waveguide to enter the optical waveguide in the optical waveguide substrate 30-1 from the optical fiber 20-1. Specifically, the optical waveguide in the optical waveguide substrate 30-1 has a core 32 that propagates light and a clad 34 that covers the core 32. Then, the excitation light incident unit 100 transmits the excitation light, which has a wavelength different from that of light used for optical communication, and causes the core material to fluoresce without passing through the interface between the core 32 and the clad 34 from the optical fiber 20-1. Directly incident on.

  More specifically, the excitation light incident unit 100 may cause the light that causes the optical waveguide formed of an inorganic material to fluoresce in the visible band, to be incident on the optical waveguide in the optical waveguide substrate 30-1. Moreover, not only an inorganic material but the excitation light incident part 100 is light in the optical waveguide board | substrate 30-1 for the light which makes the optical waveguide formed with organic materials, such as polysilane, an acryl, or an epoxy, fluoresce in a visible band. You may make it enter with respect to a waveguide. As an example, the excitation light incident unit 100 may collect green light with a wavelength of 543 nm of a He—Ne laser with an objective lens and enter the optical fiber 20-1.

  Here, the optical fiber 20-1 is an example of a first optical wiring component according to the present invention. Instead of this, the optical wiring component is a substrate provided with an optical waveguide for propagating light, an optical path conversion pin for changing the light propagation direction by 90 degrees, and the light incident from one side is distributed and emitted in a plurality of directions. It may be a distributor, a combiner that combines and emits light incident from a plurality of directions into light in one direction, or a microlens that collects the emitted light. The optical wiring component may be an element such as a light emitting element that emits light or a light receiving element that receives light.

  The normal light incident unit 110 causes light for optical communication to enter the optical waveguide in the optical waveguide substrate 30-1 from the optical fiber 20-1. For example, the normal light incident unit 110 is used exclusively with the excitation light incident unit 100 in order to further increase the adjustment accuracy of the optical connection. The light observation unit 120 observes the optical waveguide in the optical waveguide substrate 30-1 from a side surface different from the end surface where the light propagating through the optical waveguide is to be incident or emitted, and receives fluorescence emitted from the optical waveguide. To do. That is, the light observation unit 120 receives the fluorescence emitted from the inside of the core 32 through the clad 34.

  Specifically, the position and focus of the camera 115 are set in advance so that an image in a range where the core 32 of the optical waveguide substrate 30-1 is present can be taken. And the light observation part 120 may image | photograph the image of the fluorescence emitted from the side surface of the optical waveguide of the optical waveguide board | substrate 30-1 using the camera 115. FIG. In addition to this, the light observation unit 120 may measure the intensity of transmitted light transmitted through the optical waveguide of the optical waveguide substrate 30-1 by the camera 118 in order to further improve the adjustment accuracy of the optical connection.

  The optical wiring component position / orientation control unit 130 changes the position or angle of the optical fiber 20-1 relative to the optical waveguide substrate 30-1 by moving the optical fiber 20-1 relative to the optical waveguide substrate 30-1. . For example, the optical wiring component position / orientation control unit 130 includes an optical wiring component coarse movement unit 132 that moves the optical fiber 20-1 by a predetermined first unit distance relative to the optical waveguide substrate 30-1, and an optical fiber. An optical wiring component fine movement part 134 that moves the fiber 20-1 by a predetermined second unit distance shorter than the first unit distance with respect to the optical waveguide substrate 30-1.

  The straightness determining unit 140 determines the straightness of light propagated through the optical waveguide of the optical waveguide substrate 30-1 based on the fluorescence image photographed by the light observation unit 120. Then, the connection adjustment unit 150 adjusts the optical connection between the optical fiber 20-1 and the optical waveguide substrate 30-1 based on the straightness of light determined by the straightness determination unit 140. For example, the connection adjusting unit 150 determines the straightness of the light image every time the optical fiber 20-1 is moved by the optical wiring component position and orientation control unit 130, and the optical fiber 20- in the case where the straightness is the highest. The position 1 may be determined as the installation position of the optical fiber 20-1. Furthermore, the connection adjusting unit 150 may adjust the optical connection between the optical fiber 20-2 and the optical waveguide substrate 30-1 as an example of the second optical wiring component.

  FIG. 2 shows a specific example of a fluorescent image photographed in the photographing range 35. (A) shows the fluorescence image image | photographed when excitation light injects into the center of the end surface of the core 32. FIG. This incidence is called core center incidence. Incident light travels straight through the center of the core 32. In this case, the contrast of the image is high, and the incident light is observed as a narrow image. (B) shows an image of fluorescence taken when excitation light is incident on the clad 34. This incidence is called clad incidence. Incident light has a short distance to be diffused and propagated in the clad 34.

  (C) shows a fluorescence image taken when excitation light is incident obliquely on the end face of the core 32. This incidence is called core oblique incidence. Incident light is repeatedly reflected by the interface between the core 32 and the clad 34. In this case, the attenuation proceeds due to reflection, and the light intensity decreases. Each of (d) and (e) shows a fluorescence image taken when excitation light is incident on a point deviated from the center of the end face of the core 32. These incidents are referred to as core offset incident 1 and core offset incident 2, respectively. Incident light gradually approaches the center while meandering by diffusion and reflection. In this case, the light intensity is reduced and the contrast of the light image is low.

  In this way, when the light image is not observed as a straight line, the light does not travel straight and the light decays quickly. Therefore, the straightness determination unit 140 determines that the change amount of the inclination of the fluorescence image photographed by the light observation unit 120 with respect to the propagation direction in which the light should be propagated through the optical waveguide is smaller than the propagation direction. It is determined that the straightness of the light is higher than when the amount of change is larger. For example, the straightness determination unit 140 integrates the absolute value of the inclination of the fluorescence image with respect to the propagation direction, and when the integrated value is smaller than when the value is larger, the straightness of light travels straight. You may judge that the nature is higher.

  FIG. 3 shows the intensity of fluorescence in an image on a straight line perpendicular to the light propagation direction among the fluorescent images photographed in the photographing range 35. In the above figure, excitation light is incident on five parallel optical waveguides by core center incidence, clad incidence, core oblique incidence, core offset incidence 1, and core offset incidence 2, respectively. These incidents correspond to (a) to (e) of FIG.

  According to (a), in the case of incidence in the center of the core, the intensity of fluorescence in the brightest part is 23000. And the half width which is the distance from the position where the intensity is the highest to the position where the intensity is halved compared with the intensity is 20. According to (b), in the case of clad incidence, the intensity of fluorescence in the brightest part is 13000. The half width is 80.

  According to (c), in the case of oblique core incidence, the intensity of fluorescence in the brightest part is 20000. The full width at half maximum is 20. According to (d), in the case of the core offset incidence 1, the intensity of fluorescence in the brightest part is 18000. The full width at half maximum is 70. According to (e), in the case of core offset incidence 2, the intensity of fluorescence in the brightest part is 19000. The half width is 50.

  Thus, when the contrast of the light image is low, the light does not travel straight and the light intensity is low. Therefore, for example, first, the straightness determination unit 140, for the image on the straight line perpendicular to the light propagation direction among the fluorescence images taken by the light observation unit 120, from the brightest position of the fluorescence on the straight line, The width to the position on the straight line that calculates the intensity of the fluorescence at a predetermined ratio with respect to the fluorescence at the position is calculated. As an example, the straightness determination unit 140 calculates a half-value width that is a width from the brightest position to a position that is 50% of the intensity of the brightest position.

  Then, the straightness determination unit 140 determines that the straightness of light is higher when the half-value width is narrower than the case where the half-value width is wider, since the contrast of the light image is higher. . More specifically, when the integral value obtained by integrating the half-value width in the light propagation direction is smaller, the straightness determination unit 140 determines that the straightness of light is higher than when the integral value is larger. You may judge.

  Instead of this, or in addition to this, the straight-ahead determination unit 140 is configured to detect the fluorescence on the straight line for the image on the straight line perpendicular to the light propagation direction among the fluorescent images photographed by the light observation unit 120. When the symmetry of the image centered on the brightest position is higher, the straightness of light may be determined to be higher than when the symmetry is lower. More specifically, the straightness determination unit 140 calculates an integrated value obtained by integrating the difference between the half width at one side and the half width at the other side in the light propagation direction. It may be determined that the straightness of the light is higher than that in the case where is larger.

  4 and 5 show changes in the fluorescence intensity with respect to the light propagation direction in the fluorescence image photographed in the photographing range 35. FIG. These fluorescence intensities correspond to the respective incidents shown in FIGS. According to (a), in the case of incidence in the center of the core, the change in intensity is small and the attenuation of intensity is slow. According to (b), in the case of clad incidence, although the intensity change is small, the intensity attenuation is abrupt. According to (c), the intensity change is large in the case of oblique incidence of the core. According to (d) and (e), in the case of the core offset incidence 1 and the core offset incidence 2, the intensity change is large, and the intensity attenuation is abrupt.

  Thus, when the change in fluorescence intensity is larger, the straightness of light is low and the light is rapidly attenuated. Accordingly, the straightness determination unit 140 has a larger change amount when the change amount of the brightness of the fluorescent image photographed by the light observation unit 120 is smaller with respect to the propagation direction in which the light is propagated through the optical waveguide. Compared to the case, it is determined that the straightness of light is higher.

  As described above, the method in which the straightness determination unit 140 determines the straightness of light has been described with reference to FIGS. 2 to 5, but the straightness determination method is not limited to the above method. For example, the straightness determination unit 140 may evaluate the contrast, symmetry, or intensity change of the fluorescence image using an existing image analysis algorithm, and may determine straightness based on the evaluation value.

  Here, FIGS. 2 to 5 show that excitation light is incident on an optical waveguide substrate 30-1 having a core diameter of 50 microns and a cladding layer of 50 microns from an optical fiber 20-1 having a core diameter of 50 microns and a cladding diameter of 125 microns. The experimental data about the fluorescence image in the case of being done is shown. In this case, since the core diameters of the optical fiber 20-1 and the optical waveguide substrate 30-1 are the same, the excitation light incident from the optical fiber 20-1 is either the core or the cladding of the optical waveguide substrate 30-1. In many cases, it is incident on the. For this reason, it is rare that excitation light is incident on both the core and the clad.

  On the other hand, when the core diameter of the optical fiber 20-1 is larger than the core diameter of the optical waveguide substrate 30-1, the excitation light incident from the optical fiber 20-1 is converted into the optical waveguide substrate 30-1. May be incident on each of the core and the clad. In such a case, the excitation light is propagated by each of the core and the clad. However, the excitation light incident on the clad is attenuated much faster than the excitation light incident on the core. For this reason, if the light image is analyzed and the determination is made based on the portion having the highest light intensity, only the straightness of the excitation light incident on the core can be determined. As described above, the adjustment device 10 in the present embodiment is based on the position where the fluorescence intensity is strongest even when the core diameter of the optical fiber 20-1 is larger than the core diameter of the optical waveguide substrate 30-1. By analyzing the image, it is possible to appropriately determine the straightness of the incident light.

Next, four application examples in which the optical connection is adjusted by the adjustment device 10 will be described.
FIG. 6 shows an operation flow of a first application example in which the optical connection is adjusted by the adjustment device 10. The optical wiring component coarse movement part 132 sets a predetermined first movement range as a movement range in which the optical fiber 20-1 is moved relative to the optical waveguide substrate 30-1 (S600). Further, the optical wiring component coarse movement unit 132 sets a unit of distance to be moved in order to move the optical fiber 20-1 by a predetermined first unit distance with respect to the optical waveguide substrate 30-1.

  Under these settings, the connection adjustment unit 150 adjusts the optical connection between the optical fiber 20-1 and the optical waveguide substrate 30-1 based on the intensity of the fluorescence received by the light observation unit 120 (S610). Specifically, the light observation unit 120 receives fluorescence emitted from the side surface of the optical waveguide of the optical waveguide substrate 30-1 each time the optical fiber 20-1 is moved by the optical wiring component coarse movement unit 132. . Then, the connection adjustment unit 150 sets the position of the optical fiber 20-1 when the strongest fluorescence is received by the light observation unit 120 as the installation position of the optical fiber 20-1. More detailed processing will be described later.

  In addition to this, the adjusting device 10 may adjust the optical connection for connecting the optical fiber 20-2 to the optical waveguide substrate 30-1 by substantially the same processing as S600 and S610. Thus, since each of the entrance side and exit side of an optical waveguide can be adjusted independently, it can prevent setting to the local optimal position. Moreover, since each optical connection can be adjusted independently, the adjustment process in the case where a large number of optical wiring components are sequentially connected in series can be simplified, and the adjustment accuracy can be increased.

  Next, the optical wiring component fine movement unit 134 has a predetermined size narrower than the first movement range including the position of the optical fiber 20-1 when the strongest fluorescence is received by the light observation unit 120. The two moving ranges are set as moving ranges in which the optical fiber 20-1 is moved with respect to the optical waveguide substrate 30-1 (S620). Further, the optical wiring component fine movement unit 134 sets a unit of distance to be moved in order to move the optical fiber 20-1 by a predetermined second unit distance shorter than the first unit distance.

  Under these settings, the connection adjustment unit 150 adjusts the optical connection between the optical fiber 20-1 and the optical waveguide substrate 30-1 based on the intensity of the fluorescence received by the light observation unit 120 (S630). Specifically, the light observation unit 120 receives fluorescence emitted from the side surface of the optical waveguide of the optical waveguide substrate 30-1 each time the optical fiber 20-1 is moved by the optical wiring component fine movement unit 134. Then, the connection adjustment unit 150 sets the position of the optical fiber 20-1 when the strongest fluorescence is received by the light observation unit 120 as the installation position of the optical fiber 20-1. In addition to this, the adjustment apparatus 10 may adjust the optical connection for connecting the optical fiber 20-2 to the optical waveguide substrate 30-1 by substantially the same processing as S620 and S630.

  As described above, the adjustment device 10 performs rough adjustment once and then performs adjustment with higher accuracy by narrowing the moving range than the adjustment. Thereby, the time required for adjustment can be reduced, and the accuracy of the adjustment can be increased.

  FIG. 7 shows an operation flow of the second application example in which the optical connection is adjusted by the adjustment device 10. The processing from S700 to S720 is substantially the same as the processing from S600 to S620 described with reference to FIG. Under the setting in S720, the connection adjusting unit 150 sets the optical fiber 20 based on the intensity of the transmitted light that the light for optical communication incident by the normal light incident unit 110 passes through the optical waveguide of the optical waveguide substrate 30-1. -1 and the optical waveguide substrate 30-1 are adjusted (S730).

  Specifically, the light observation unit 120 receives transmitted light that passes through the optical waveguide of the optical waveguide substrate 30-1 each time the optical fiber 20-1 is moved by the optical wiring component fine movement unit 134. And the connection adjustment part 150 determines the position of the optical fiber 20-1 when the strongest transmitted light is received by the light observation part 120 as an installation position of the optical fiber 20-1.

  Thus, according to the application example of this figure, first, the connection adjustment unit 150 determines whether the optical fiber 20-1 and the optical waveguide substrate 30-1 are based on the intensity of the fluorescence received by the light observation unit 120. Adjust the optical connection with a predetermined accuracy. Thereafter, the connection adjusting unit 150 performs the optical connection between the optical fiber 20-1 and the optical waveguide substrate 30-1 based on the intensity of the transmitted light through which the light incident by the normal light incident unit 110 passes through the optical waveguide. Adjust with higher accuracy than the predetermined accuracy. Thereby, in a situation where transmitted light can be observed, the accuracy of adjustment can be further increased.

  FIG. 8 shows an operation flow of the third application example in which the optical connection is adjusted by the adjustment device 10. In this example, processing in the case of connecting each of the optical fiber 20-1 and the optical fiber 20-2 to each of the incident side and the emission side of the optical waveguide substrate 30-1 will be described. First, the optical wiring component position / orientation control unit 130 selects the optical fiber 20-1 as an adjustment target (S800). For example, the optical wiring component position / orientation control unit 130 moves the optical fiber 20-1 within a predetermined movement range by a predetermined unit distance relative to the optical waveguide substrate 30-1. And set the unit distance.

  Next, the connection adjusting unit 150 adjusts the optical connection between the optical fiber 20-1 and the optical waveguide substrate 30-1 based on the intensity of the fluorescence received by the light observation unit 120 (S810). Specifically, the excitation light incident unit 100 enters the excitation light from the optical fiber 20-1 to one end of the optical waveguide substrate 30-1. The light observation unit 120 receives the fluorescence emitted from the side surface of the optical waveguide of the optical waveguide substrate 30-1 every time the optical fiber 20-1 is moved by the optical wiring component position / posture control unit 130. Then, the connection adjustment unit 150 sets the position of the optical fiber 20-1 when the strongest fluorescence is received by the light observation unit 120 as the installation position of the optical fiber 20-1.

  Next, the optical wiring component position / orientation control unit 130 selects the optical fiber 20-2 as an adjustment target (S820). For example, the optical wiring component position / orientation control unit 130 moves the optical fiber 20-2 with respect to the optical waveguide substrate 30-1 by a predetermined unit distance within a predetermined movement range. And set the unit distance. Next, the connection adjusting unit 150 is based on the intensity of transmitted light that is transmitted through the optical waveguide substrate 30-1 and the optical fiber 20-2 when the communication light incident by the normal light incident unit 110 is transmitted. Then, the optical connection between the optical waveguide substrate 30-1 and the optical fiber 20-2 is adjusted (S830).

  Specifically, the normal light incidence unit 110 causes light for optical communication to enter the optical fiber 20-2 via the optical waveguide substrate 30-1 by the optical fiber 20-1. The light observation unit 120 receives the transmitted light that is emitted from the light incident from the normal light incident unit 110 through the optical waveguide substrate 30-1 and the optical fiber 20-2. The connection adjustment unit 150 determines the position of the optical fiber 20-2 when the intensity of the transmitted light is the strongest as the position where the optical fiber 20-2 is to be installed.

  Thus, if one of the incident side and the emission side is adjusted by the intensity of the fluorescence emitted from the side surface, the other of the incident side and the emission side can be adjusted without any problem by the conventional method using transmitted light. That is, according to the adjusting apparatus 10 of the present embodiment, the disadvantages of the conventional method can be supplemented by combining with the conventional method.

  Instead, the light observation unit 120 may receive the transmitted light emitted by the excitation light incident by the excitation light incident unit 100 passing through the optical waveguide substrate 30-1 and the optical fiber 20-2. . In this case, the connection adjusting unit 150 adjusts the optical connection between the optical fiber 20-2 and the optical waveguide substrate 30-1 based on the intensity of the transmitted light of the excitation light. As described above, when the optical waveguide is sufficiently short and the attenuation of the excitation light is small, the normal light incident portion 110 and the like are not necessary, and the configuration of the adjusting device 10 can be simplified.

  FIG. 9 shows an operation flow of a process for adjusting the optical connection based on the intensity of fluorescence. The excitation light incident unit 100 causes excitation light that fluoresces the optical waveguide of the optical waveguide substrate 30-1 to enter the optical waveguide substrate 30-1 from the optical fiber 20-1 (S900). Then, the optical wiring component position / orientation control unit 130 determines the relative angle of the optical fiber 20-1 with respect to the end surface of the optical waveguide substrate 30-1 and the optical fiber 20-1 with respect to the installation position of the optical waveguide substrate 30-1. Are adjusted relative to each other (S910 to S940).

  Specifically, first, the optical wiring component position / orientation control unit 130 predetermines the polar angle of the optical fiber 20-1 with respect to the surface of the optical waveguide substrate 30-1 within a predetermined range. The following determination is made for each polar angle that has been changed by the specified angle (S910). Further, the optical wiring component position / orientation control unit 130 sets the azimuth angle of the optical fiber 20-1 with respect to the surface of the optical waveguide substrate 30-1 by a predetermined angle within a predetermined range. The following determination is performed for each changed azimuth angle (S920).

  Further, the optical wiring component position / orientation control unit 130 performs the following for each position moved horizontally within the set movement range by the set unit distance with respect to the surface of the optical waveguide substrate 30-1. A determination is made (S930). Further, the optical wiring component position / orientation control unit 130 moves within the set moving range by a set unit distance in a direction perpendicular to the surface of the optical waveguide substrate 30-1. The following determination is made (S940).

  In the connection adjustment unit 150, the polar angle, the azimuth angle, the horizontal position, and the vertical position, which are changed and determined by the optical wiring component position and orientation control unit 130, are set as positions where the optical fiber 20-1 is to be installed. It is determined whether it is suitable (S950).

  The above determination is performed every time the vertical position is changed, every time the horizontal position is changed, every time the azimuth angle is changed, and every time the polar angle is changed (S960, S970). , S980, S990). Next, the connection adjusting unit 150 installs the optical fiber 20-1 at the position determined as the position where the optical fiber 20-1 should be installed in S950 (S995).

  FIG. 10 shows details of the processing in S950 of FIG. The light observation unit 120 captures an image of fluorescence emitted from the side surface of the optical waveguide of the optical waveguide substrate 30-1 (S1000). When the optical waveguide substrate 30-1 has a light emitting portion (S1110: YES), the light observation unit 120 determines whether fluorescence is emitted from the side surfaces of the plurality of optical waveguides (S1120).

  When fluorescence is emitted from the side surfaces of the plurality of optical waveguides (S1120: YES), the light observation unit 120 selects one optical waveguide designated by the user as an adjustment target from among the plurality of optical waveguides. (S1130), the fluorescence emitted from the side surface of the selected one optical waveguide is received. In this case, the optical wiring component position / orientation control unit 130 resets the movement range in which the optical fiber 20-1 is moved relative to the optical waveguide substrate 30-1 to a range centered on the specified one optical waveguide. It may be set (S1140).

  Next, the straightness determination unit 140 determines the straightness of light propagated through the optical waveguide based on the fluorescence image photographed by the light observation unit 120 (S1150). Instead, the connection adjustment unit 150 may determine the intensity of the fluorescence based on the fluorescence image captured by the light observation unit 120. If the straightness or the strength is the highest (S1160: YES), the connection adjustment unit 150 registers the current position and angle of the optical fiber 20-1 as the installation position of the optical fiber 20-1. (S1170).

  As described above, as shown in FIGS. 9 and 10, the optical component position / orientation control unit 130 sequentially changes the position and angle of the optical fiber 20-1, and the light observation unit 120 changes the position and angle. Every time it receives fluorescence. Then, the connection adjusting unit 150 determines the position or angle of the optical fiber 20-1 when the fluorescence intensity or the straightness of the excitation light is highest as the position or angle of the optical fiber 20-1. Thereby, the optical connection can be adjusted based on the intensity of the fluorescence emitted from the side surface of the optical waveguide without measuring the intensity of the transmitted light that is transmitted through the optical waveguide.

  FIG. 11 shows the configuration of the adjusting device 10 in the first modification. In this modification, unlike FIG. 1, the optical fiber 20-1 and the camera 115 are connected. Here, the camera 115 is a device that measures the intensity of fluorescence emitted from a point on a plane, such as a photodiode. Preferably, the camera 115 is on a normal line with respect to the surface of the optical waveguide substrate 30-1 at a position on an extension line of light incident on the optical waveguide of the optical waveguide substrate 30-1 from the optical fiber 20-1. Be placed. More preferably, the camera 115 does not move even when the optical fiber 20-1 moves in a direction perpendicular to the plane of the optical waveguide substrate 30-1, and the distance between the optical fiber 20-1 and the optical waveguide substrate 30-1 is not changed. Maintain the appropriate size for measuring the strength.

  That is, for example, as the optical fiber component position / orientation control unit 130 moves the optical fiber 20-1 in a direction horizontal to the plane of the optical waveguide substrate 30-1, the camera 115 is moved relative to the optical waveguide substrate 30-1. As a result, the light observation unit 120 can change the position to be observed as the optical fiber 20-1 is moved by the optical wiring component position / posture control unit 130. Since the other structure about the adjustment apparatus 10 in this modification is substantially the same as the structure shown in FIG. 1, description is abbreviate | omitted.

  As described above, according to the present modification, the light observation unit 120 is always incident on the optical waveguide of the optical waveguide substrate 30-1 from the optical fiber 20-1 even when the optical fiber 20-1 is moved. Fluorescence emitted from a position on the extended line of light to be received can be received. Thus, unlike the example of FIG. 1, it is not necessary to capture the entire fluorescence image, and it is not necessary to determine the installation position of the camera 115 in advance prior to adjustment. Can be simplified.

  FIG. 12 shows the configuration of the adjusting device 10 in the second modification. The adjustment device 10 includes a reflective film 40, an excitation light incident unit 100, a light observation unit 120, a light receiving element 125, an optical wiring component position / orientation control unit 130, and a connection adjustment unit 150. In this example, the middle of the optical fiber 20-1 is cut, and a lens and a prism are placed between the two fibers before and after cutting. A reflective film 40 is formed on the reflective surface of the prism. The reflection film 40 is, for example, a multilayer reflection film using Bragg reflection. In this case, the reflection wavelength of the reflection film 40 is set to the wavelength of fluorescence from the waveguide material.

  The excitation light incident unit 100 causes excitation light that fluoresces the optical waveguide of the optical waveguide substrate 30-1 to enter the optical waveguide substrate 30-1 from the optical fiber 20-1. At this time, the excitation light emitted from the excitation light incident unit 100 passes through the reflection film 40 and enters the optical fiber 20-1. This excitation light causes the core material of the waveguide to fluoresce, and the fluorescence repeats total reflection at the core / cladding interface and is emitted from the end face of the waveguide. For this reason, fluorescence is also emitted from the end face on which the excitation light is incident.

  The fluorescence emitted from the optical fiber 20-1 is reflected by the reflective film 40, the traveling direction is changed, and reaches the light receiving element 125. That is, the light observation unit 120 receives the fluorescence of the optical waveguide substrate 30-1 emitted from the optical waveguide substrate 30-1 to the optical fiber 20-1 by the light receiving element 125. Here, when the fluorescence received by the light receiving element 125 is stronger, the excited core material becomes more. And when there are more excited core materials is when the straightness and intensity | strength of the excitation light propagated by an optical waveguide are higher.

Therefore, the optical wiring component position / orientation control unit 130 moves the optical fiber 20-1 relative to the optical waveguide substrate 30-1, and the light observation unit 120 controls the optical fiber 20-1 for optical wiring component position / orientation control. Fluorescence is received every time it is moved by the unit 130. And the connection adjustment part 150 determines the position of the optical fiber 20-1 in the case where the intensity | strength of the fluorescence is the strongest as an installation position of the optical fiber 20-1 based on the intensity | strength of the fluorescence. The other configuration of the adjustment device 10 in this modification is substantially the same as that of the adjustment device 10 described in FIG.
As described above, according to this modification, even when the side surface of the optical waveguide cannot be observed, the optical connection can be appropriately adjusted based on the intensity of the fluorescence emitted from the end surface of the optical waveguide.

  FIG. 13 shows a configuration of the adjusting device 10 in the third modification. The adjustment apparatus 10 includes an excitation light incident unit 100, a normal light incident unit 110, a light observation unit 120, an optical wiring component position and orientation control unit 130, a straightness determination unit 140, and a connection adjustment unit 150. . Unlike the adjusting device 10 shown in FIG. 1, the adjusting device 10 in the present modification includes an optical fiber 20-1, an optical waveguide substrate 30-1 that is a first optical waveguide, and an optical waveguide substrate 30-1. The purpose of aligning these optical waveguides is to connect the optical waveguide substrate 30-2, which is a long second optical waveguide, in series.

  The excitation light incident unit 100 makes excitation light incident on one end of the optical waveguide substrate 30-1 from the optical fiber 20-1. The normal light incident unit 110 causes light for optical communication to enter the optical waveguide in the optical waveguide substrate 30-1 from the optical fiber 20-1. For example, the normal light incident unit 110 is used exclusively with the excitation light incident unit 100 in order to further increase the adjustment accuracy of the optical connection. The light observation unit 120 receives the fluorescence of the optical waveguide substrate 30-1 by the excitation light incident on the optical waveguide substrate 30-1 by the camera 115.

  The optical wiring component position / orientation control unit 130 moves the optical fiber 20-1 relative to the optical waveguide substrate 30-1. For example, the optical wiring component position / orientation control unit 130 includes an optical wiring component coarse movement unit 132 that moves the optical fiber 20-1 by a predetermined first unit distance relative to the optical waveguide substrate 30-1, and an optical fiber. An optical wiring component fine movement part 134 that moves the fiber 20-1 by a predetermined second unit distance shorter than the first unit distance with respect to the optical waveguide substrate 30-1.

  The straightness determining unit 140 determines the straightness of light propagated through the optical waveguide of the optical waveguide substrate 30-1 based on the fluorescence image photographed by the light observation unit 120. Then, the connection adjustment unit 150 adjusts the optical connection between the optical fiber 20-1 and the optical waveguide substrate 30-1 based on the straightness of light determined by the straightness determination unit 140. For example, the connection adjusting unit 150 determines the straightness of the light image every time the optical fiber 20-1 is moved by the optical wiring component position and orientation control unit 130, and the optical fiber 20- in the case where the straightness is the highest. The position 1 may be determined as the installation position of the optical fiber 20-1.

  Then, the light observation unit 120 further detects the fluorescence of the optical waveguide substrate 30-2 by the excitation light emitted from the other end of the optical waveguide substrate 30-1 and incident from one end of the optical waveguide substrate 30-2. Receives light. Similarly, the straightness determining unit 140 similarly determines the straightness of light propagated through the optical waveguide of the optical waveguide substrate 30-2 based on the fluorescence image photographed by the light observation unit 120. The connection adjustment unit 150 adjusts the optical connection between the optical waveguide substrate 30-1 and the optical waveguide substrate 30-2 based on the straightness of light determined by the straightness determination unit 140.

  FIG. 14 shows an operation flow of processing for adjusting the optical connection by the adjusting device 10 in the third modification. The optical wiring component position / orientation control unit 130 selects the optical waveguide substrate 30-1 as an adjustment target (S1400). For example, the optical fiber component position / orientation control unit 130 moves the optical fiber 20-1 relative to the optical waveguide substrate 30-1, or moves the optical fiber 20-1 relative to the optical waveguide substrate 30-1. A unit of movement to be performed may be set.

  The connection adjustment unit 150 adjusts the optical connection between the optical fiber 20-1 and the optical waveguide substrate 30-1 based on the intensity of the fluorescence received by the light observation unit 120 (S1410). Details of the processing in S1410 are substantially the same as the processing described in FIG. Subsequently, the optical wiring component position / orientation control unit 130 selects the optical waveguide substrate 30-2 as an adjustment target (S1420). For example, the optical wiring component position / orientation control unit 130 moves the optical waveguide substrate 30-2 relative to the optical waveguide substrate 30-1, or moves the optical waveguide substrate 30-2 relative to the optical waveguide substrate 30-1. The unit of movement to be moved may be set. The connection adjustment unit 150 adjusts the optical connection between the optical waveguide substrate 30-2 and the optical waveguide substrate 30-1 based on the intensity of the fluorescence received by the light observation unit 120 (S1430). Details of the processing in S1410 are substantially the same as the processing described in FIG.

  As described above, according to this example, when a plurality of optical waveguides are connected in series, the alignment of the plurality of connection portions is performed collectively by the excitation light incident on one optical waveguide. Can do. Thereby, since it is not necessary to change an incident location, the whole number of processes accompanying adjustment of an optical connection can be reduced. Further, when two optical waveguides are connected in series, fluorescence can be appropriately generated from each of the optical waveguides by making the excitation light incident on the shorter optical waveguide.

  As described above, as shown in the present embodiment and the modifications thereof, the adjustment device 10 accurately determines whether or not the incident light is transmitted through the core of the optical waveguide by the fluorescence image observed from the side surface of the optical waveguide. Judgment can be made. For this reason, it is not necessary to find the position of the core in advance prior to adjustment, and the number of adjustment steps can be reduced. In addition, since the incident side and the emission side can be adjusted independently, it is possible to prevent the adjustment to the local optimum position. Further, when a new optical wiring component is added to the existing optical wiring, a test for transmitting light to the entire optical wiring is unnecessary, and only new optical connection can be adjusted, so that the work efficiency is high. Further, since the optical waveguide is sufficiently short, the optical connection can be appropriately adjusted even when the clad incident and the core incident cannot be distinguished only by the intensity of the transmitted light.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

FIG. 1 shows the configuration of the adjusting device 10. FIG. 2 shows a specific example of a fluorescent image photographed in the photographing range 35. FIG. 3 shows the intensity of fluorescence in an image on a straight line perpendicular to the light propagation direction among the fluorescent images photographed in the photographing range 35. FIG. 4 shows changes in fluorescence intensity with respect to the light propagation direction in the fluorescence image photographed in the photographing range 35. FIG. 5 shows changes in fluorescence intensity with respect to the light propagation direction in the fluorescence image photographed in the photographing range 35. FIG. 6 shows an operation flow of a first application example in which the optical connection is adjusted by the adjustment device 10. FIG. 7 shows an operation flow of the second application example in which the optical connection is adjusted by the adjustment device 10. FIG. 8 shows an operation flow of the third application example in which the optical connection is adjusted by the adjustment device 10. FIG. 9 shows an operation flow of a process for adjusting the optical connection based on the intensity of fluorescence. FIG. 10 shows details of the processing in S950 of FIG. FIG. 11 shows the configuration of the adjusting device 10 in the first modification. FIG. 12 shows the configuration of the adjusting device 10 in the second modification. FIG. 13 shows a configuration of the adjusting device 10 in the third modification. FIG. 14 shows an operation flow of processing for adjusting the optical connection by the adjusting device 10 in the third modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Adjustment apparatus 20 Optical fiber 30 Optical waveguide board 32 Core 34 Clad 35 Image | photographing range 40 Reflective film 100 Excitation light incident part 110 Normal light incident part 115 Camera 117 Camera 118 Camera 120 Light observation part 125 Light receiving element 130 Component position and orientation of optical wiring Control unit 132 Optical wiring component coarse movement unit 134 Optical wiring component fine movement unit 140 Straightness determination unit 150 Connection adjustment unit

Claims (18)

An optical waveguide having a core for propagating light and a clad covering the core, and fluorescent in the visible band, and an optical wiring for receiving light incident on or emitted from the optical waveguide An adjustment device for adjusting the optical connection with the parts for
An excitation light incident portion that causes light that fluoresces the core material to be incident on the core without passing through the interface between the core and the cladding from the optical wiring component;
An optical observation unit that observes the optical waveguide from a side surface different from an end surface on which light propagating in the optical waveguide is to be incident or emitted, and receives fluorescence emitted from the inside of the core through the cladding When,
Optical connection between the optical wiring component and the optical waveguide is performed so that the position of the optical wiring component when the strongest fluorescence is received by the light observation unit is set as the installation position of the optical wiring component. A connection adjustment unit for adjusting , and
The light observation unit captures an image of fluorescence emitted from the side surface of the optical waveguide,
Further comprising a rectilinearity determination unit for determining rectilinearity of light propagated through the optical waveguide based on the fluorescence image photographed by the light observation unit;
The connection adjusting unit adjusts the optical connection between the optical wiring component and the optical waveguide based on the straightness of light determined by the straightness determining unit . The optical waveguide shares the clad with other optical waveguides,
When the fluorescence is emitted from the side surfaces of the plurality of optical waveguides, the light observation unit selects one optical waveguide designated as an adjustment target from the plurality of optical waveguides, and selects the selected one light Receiving fluorescence emitted from the side of the waveguide,
The connection adjusting unit optically connects the optical wiring component and the optical waveguide so that the position of the optical wiring component when the strongest fluorescence is received is set as the installation position of the optical wiring component. The adjusting device according to claim 1 . The excitation light incident part, a light to be fluorescent the optical waveguide, adjusting device according to claim 1 or 2 light enters the wavelength different from that of the light used for optical communication with respect to the optical waveguide. The adjusting device according to any one of claims 1 to 3, wherein the excitation light incident unit causes light that causes the optical waveguide formed of an organic material to fluoresce in a visible band, to the optical waveguide. The excitation light incident portion, polysilane, acrylic, or the light is fluorescent in the visible band through the optical waveguide which is formed by epoxy, according to any one of claims 1 to be incident 4 relative to the optical waveguide Adjusting device. The rectilinearity determining unit determines the change when the amount of change with respect to the propagation direction of the inclination of the fluorescence image taken by the light observation unit with respect to the propagation direction in which light should propagate through the optical waveguide is smaller. The adjusting device according to any one of claims 1 to 5, wherein it is determined that the straightness of the light is higher than when the amount is larger. The straightness determination unit has a larger amount of change when the amount of change of the brightness of the fluorescence image taken by the light observation unit with respect to the propagation direction in which light is propagated through the optical waveguide is smaller. The adjustment device according to any one of claims 1 to 5, wherein it is determined that the straightness of the light is higher than the case . The straight-advancing determination unit is configured to change, from the brightest position of fluorescence on the straight line to the fluorescence at the position, on an image on a straight line perpendicular to the light propagation direction among the fluorescent images captured by the light observation unit. Calculate the width to the position on the straight line that becomes the intensity of fluorescence of a predetermined ratio with respect to the straight line, and when the calculated width is narrower, the straightness of light compared to when the width is wider The adjustment device according to any one of claims 1 to 5, wherein the adjustment device is determined to be higher. The straightness determining unit is configured to determine, for the image on the straight line perpendicular to the light propagation direction, the image centered on the brightest position of the fluorescence on the straight line. The adjusting device according to any one of claims 1 to 5 , wherein when the symmetry is higher, it is determined that the straightness of light is higher than when the symmetry is lower. An optical wiring component coarse movement section that moves the optical wiring component by a predetermined first unit distance relative to the optical waveguide;
The light observation unit receives fluorescence emitted from a side surface of the optical waveguide every time the optical wiring component is moved by the optical wiring component coarse movement unit,
The second predetermined range shorter than the first unit distance is within a predetermined range narrower than the moving range by the optical wiring component coarse movement unit, including the position where the strongest fluorescence is received by the light observation unit. Further equipped with a fine movement part for optical wiring that moves by unit distance,
The light observation unit receives fluorescence emitted from a side surface of the optical waveguide every time the optical wiring component is moved by the optical wiring component fine movement unit,
The said connection adjustment part determines the position of the said components for optical wiring in case the intensity | strength of the fluorescence received by the said light observation part is the strongest as an installation position of the said components for optical wiring . 2. The adjusting device according to item 1 . The optical wiring component further comprises a normal light incident part for making light for optical communication incident on the optical waveguide,
The connection adjusting unit includes the optical wiring component so that the position of the optical wiring component when the intensity of the fluorescence received by the light observation unit is the strongest is the installation position of the optical wiring component. The position of the optical wiring component when the optical connection with the optical waveguide is adjusted with a predetermined accuracy, and the intensity of the transmitted light through which the light incident by the normal light incident portion passes through the optical waveguide is the strongest and so that the installation position of the component optical wiring, either 5 optical connections between the optical waveguide and components for optical wiring of claims 1 to modulate in the high accuracy than the predetermined accuracy 1 The adjustment device according to item . When connecting each of the first optical wiring component and the second optical wiring component to each of the incident side and the emission side of the optical waveguide,
The excitation light incident part is configured to make light incident on one end of the optical waveguide from the first optical wiring component,
The light observation unit receives fluorescence of the optical waveguide due to light incident on the optical waveguide,
The connection adjusting unit is configured such that the position of the first optical wiring component when the intensity of the fluorescence received by the light observation unit is the strongest is the installation position of the first optical wiring component. Adjusting the optical connection between the first optical wiring component and the optical waveguide;
A normal light incident part for allowing light for optical communication to be incident on the second optical wiring component via the optical waveguide by the first optical wiring component;
The light observation unit further receives the transmitted light emitted by the light incident by the normal light incident unit through the optical waveguide and the second optical wiring component,
The connection adjusting unit is further configured to transmit the light incident from the normal light incident unit through the optical waveguide and the second optical wiring component and emit light with the highest intensity of the transmitted light. the position of the second component optical interconnection, so that the installation position of the second component optical wiring, claims 1 to adjust the optical connection between the optical waveguide and the second optical wiring parts 5 The adjusting device according to any one of the above. In the case where the first optical waveguide and the second optical waveguide longer than the first optical waveguide are connected in series to the optical wiring component,
The excitation light incident portion is configured to make light incident on one end of the first optical waveguide from the optical wiring component,
The light observation unit receives fluorescence of the first optical waveguide due to light incident on the first optical waveguide,
The connection adjusting unit includes the optical wiring component so that the position of the optical wiring component when the intensity of the fluorescence received by the light observation unit is the strongest is the installation position of the optical wiring component. Adjusting the optical connection with the first optical waveguide;
The light observation unit further receives fluorescence of the second optical waveguide due to light emitted from the other end of the first optical waveguide and incident from one end of the second optical waveguide,
The connection controller may control such that the intensity of the fluorescence of the second optical waveguide becomes strongest, one of claims 1 to 5 to adjust the optical connection between the second optical waveguide and said first optical waveguide The adjusting device according to claim 1 . An optical wiring component position / orientation control unit for moving the optical wiring component relative to the optical waveguide;
The optical observation unit changes the position to be observed as the optical wiring component is moved by the optical wiring component position / orientation control unit, thereby changing the optical wiring component from the optical wiring component. Receives fluorescence emitted from a position on the extended line of light incident on the waveguide,
The adjusting device according to any one of claims 1 to 5, wherein the connection adjusting unit installs the optical wiring component at a position where the intensity of fluorescence received by the light observation unit is the strongest. An optical waveguide having a core for propagating light and a clad covering the core, and fluorescent in the visible band, and an optical wiring for receiving light incident on or emitted from the optical waveguide An adjustment method for adjusting the optical connection with a component,
A light incident stage in which light that fluoresces the core material is incident on the core without passing through the interface between the core and the cladding from the optical wiring component;
A light observation step of observing the optical waveguide from a side surface different from an end surface on which light propagating in the optical waveguide is to be incident or emitted , and receiving fluorescence transmitted from the inside of the core through the cladding When,
The optical connection between the optical wiring component and the optical waveguide is set so that the position of the optical wiring component when the strongest fluorescence is received in the light observation stage is the installation position of the optical wiring component. A connection adjustment stage for adjusting , and
In the light observation step, an image of fluorescence emitted from the side surface of the optical waveguide is taken,
Based on the fluorescence image captured in the light observation step, further comprising a straightness determination step of determining straightness of light propagating through the optical waveguide;
The adjustment method in which the connection adjustment step adjusts the optical connection between the optical wiring component and the optical waveguide based on the straightness of light determined in the straightness determination step . The light observation step receives fluorescence emitted from the inside of the core , emitted from the optical waveguide to the optical wiring component,
In the connection adjustment step, the optical wiring component and the optical wiring component so that the position of the optical wiring component when the intensity of the fluorescence received in the light observation step is the strongest is set as the installation position of the optical wiring component. The adjusting method according to claim 15, wherein an optical connection with the optical waveguide is adjusted. An optical waveguide having a core for propagating light and a clad covering the core, and fluorescent in the visible band, and an optical wiring for receiving light incident on or emitted from the optical waveguide A manufacturing method for manufacturing an optical wiring by connecting parts for use,
A light incident stage in which light that fluoresces the core material is incident on the core without passing through the interface between the core and the cladding from the optical wiring component;
A light observation step of observing the optical waveguide from a side surface different from an end surface on which light propagating in the optical waveguide is to be incident or emitted , and receiving fluorescence transmitted from the inside of the core through the cladding When,
The optical connection between the optical wiring component and the optical waveguide is set so that the position of the optical wiring component when the strongest fluorescence is received in the light observation stage is the installation position of the optical wiring component. A connection adjustment stage for adjusting, and
In the light observation step, an image of fluorescence emitted from the side surface of the optical waveguide is taken,
Based on the fluorescence image captured in the light observation step, further comprising a straightness determination step of determining straightness of light propagating through the optical waveguide;
The manufacturing method for adjusting the optical connection between the optical wiring component and the optical waveguide based on the straight traveling property of the light determined in the straight traveling determination step . The light observation step receives fluorescence emitted from the inside of the core , emitted from the optical waveguide to the optical wiring component,
In the connection adjustment step, the optical wiring component and the optical wiring component so that the position of the optical wiring component when the intensity of the fluorescence received in the light observation step is the strongest is set as the installation position of the optical wiring component. The manufacturing method according to claim 17, wherein an optical connection with the optical waveguide is adjusted.

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